Dixon elliptic functions
In mathematics, the Dixon elliptic functions sm and cm are two elliptic functions (doubly periodic meromorphic functions on the complex plane) that map from each regular hexagon in a hexagonal tiling to the whole complex plane. Because these functions satisfy the identity cm 3 z + sm 3 z = 1 {\displaystyle \operatorname {cm} ^{3}z+\operatorname {sm} ^{3}z=1} , as real functions they parametrize the cubic Fermat curve x 3 + y 3 = 1 {\displaystyle x^{3}+y^{3}=1} , just as the trigonometric functions sine and cosine parametrize the unit circle x 2 + y 2 = 1 {\displaystyle x^{2}+y^{2}=1} .